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Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2025

Fair Value Disclosures [Abstract]

Carrying Values and Fair Values of Debt Instruments

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​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	Carrying Value at					​	Fair Value (a) at
​	​	September 30,		​	December 31,		​	September 30,		​	December 31,
​		2025			2024			2025			2024
4.25% Senior Notes due 2028	​	$	500,000	​	$	500,000	​	$	503,500	​	$	488,500
3.50% Senior Notes due 2029	​	$	500,000	​	$	500,000	​	$	491,300	​	$	471,450
4.50% Senior Notes due 2029	​	$	359,150	​	$	347,500	​	$	374,510	​	$	359,168
2.60% Senior Notes due 2030	​	$	600,000	​	$	600,000	​	$	563,220	​	$	536,220
2.20% Senior Notes due 2032	​	$	650,000	​	$	650,000	​	$	571,935	​	$	535,275
3.20% Senior Notes due 2032	​	$	500,000	​	$	500,000	​	$	462,700	​	$	437,150
4.20% Senior Notes due 2033	​	$	750,000	​	$	750,000	​	$	735,750	​	$	696,300
5.00% Senior Notes due 2034	​	$	750,000	​	$	750,000	​	$	765,525	​	$	731,625
5.25% Senior Notes due 2035	​	$	500,000	​	$	—	​	$	516,050	​	$	—
3.05% Senior Notes due 2050	​	$	500,000	​	$	500,000	​	$	338,650	​	$	321,700
2.95% Senior Notes due 2052	​	$	850,000	​	$	850,000	​	$	556,325	​	$	528,955

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(a) Senior Notes are classified as Level 2 within the fair value hierarchy. Fair value inputs include third-party calculations of the market interest rate of notes with similar ratings in similar industries over the remaining note terms.

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- Definition

Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-SubTopic 10
-Topic 825
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482881/825-10-55-10

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-13

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482881/825-10-55-12

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

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- References

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